The Kospi extended gains for a second straight session on September 1, rising 15.78 points, or 0.23%, to close at 6,835.80 after sliding as much as 1.28% to 6,732.47 early, as Other Corporations—reflecting Samsung Electronics and SK Hynix share buybacks—net bought 1.6657 trillion won and offset simultaneous selling by retail, foreign and institutional investors. The index opened at 6,784.29, down 0.52%, in another weak-start, strong-finish pattern, while Other Corporations extended their net-buying streak to 10 sessions with daily support that has recently run about 1.5 trillion to 1.6 trillion won. Samsung Electronics finished at 261,000 won, up 0.38%, and SK Hynix at 1.693 million won, up 1.14%, helped by still-running multi-trillion-won repurchase programs and August semiconductor exports that jumped 209% to a record $46.65 billion. The Kosdaq fell 1.56% to 821.25 for a second decline on foreign and institutional selling, the won traded near 1,370.4 per dollar, and analysts said expanded Other Corporations buying lifted the benchmark even as U.S. and Middle East uncertainties limited upside.